Question

我编写了一个读取Excel模板表的程序。其中隐藏了第一列。现在，我有一个代码以编程方式取消隐藏excel列（因此Column从A1开始）。

我正在使用Apache POI 3.16版本。

当我打开一个文件时，它应该显示A1中的一列，而不是从B1列显示我。当我在下面编写XLS代码时，它工作正常，但不适用于XLSX格式。

sheet.showInPane(0, 0);

我需要手动移动水平滚动条以查看我的第一列。我应该如何以编程方式实现此操作以自动滚动到XLSX格式的第一列？

这是我的完整代码。

public Workbook readWorkBookAndWriteErrors(String bufId,String inputFile, String ext) throws Exception {
        Workbook workBook =null;
        Sheet sheet = null; 
        if(GlobalVariables.EXCEL_FORMAT_XLS.equalsIgnoreCase(ext)){
             // Get the workbook instance for XLS file
            workBook = new HSSFWorkbook(new FileInputStream(inputFile));
        }else{
            // Get the workbook instance for XLSX file
            workBook = new XSSFWorkbook(new FileInputStream(inputFile));
        }
        sheet = workBook.getSheetAt(0);
        Row row = null;
        if(sheet.isColumnHidden(0)){
            sheet.setColumnHidden(0, false);
            sheet.setActiveCell(new CellAddress("A1"));
            sheet.showInPane(0, 0);
            sheet.createFreezePane(0, 1);

             Iterator<Row> rowIterator = sheet.iterator();
                int rowIndex = 1;
                while (rowIterator.hasNext()) {
                    row = rowIterator.next();
                    if(rowIndex == 1){
                        rowIndex++;
                        continue;
                    }
                    Cell cell = row.createCell(0);
                    cell.setCellValue("error message");
                    rowIndex++;
                }
        }
        return workBook;
    }

Answer 1

以下是我的问题的答案。请参阅此Source

public Workbook readWorkBookAndWriteErrors(String bufId,String inputFile, String ext) throws Exception {
        Workbook workBook =null;
        Sheet sheet = null; 
        if(GlobalVariables.EXCEL_FORMAT_XLS.equalsIgnoreCase(ext)){
             // Get the workbook instance for XLS file
            workBook = new HSSFWorkbook(new FileInputStream(inputFile));
        }else{
            // Get the workbook instance for XLSX file
            workBook = new XSSFWorkbook(new FileInputStream(inputFile));
        }
        sheet = workBook.getSheetAt(0);
        Row row = null;
        if(sheet.isColumnHidden(0)){
            sheet.setColumnHidden(0, false);

            if(sheet instanceof XSSFSheet){
                CTWorksheet ctWorksheet = null; 
                CTSheetViews ctSheetViews = null; 
                CTSheetView ctSheetView = null; 
                XSSFSheet tempSheet = (XSSFSheet) sheet;
                 // First step is to get at the CTWorksheet bean underlying the worksheet. 
                ctWorksheet = tempSheet.getCTWorksheet(); 
                // From the CTWorksheet, get at the sheet views. 
                ctSheetViews = ctWorksheet.getSheetViews(); 
                // Grab a single sheet view from that array 
                ctSheetView = ctSheetViews.getSheetViewArray(ctSheetViews.sizeOfSheetViewArray() - 1); 
                // Se the address of the top left hand cell. 
                ctSheetView.setTopLeftCell("A1"); 
            }else{
                 sheet.setActiveCell(new CellAddress("A1"));
                 sheet.showInPane(0, 0);
            }


             Iterator<Row> rowIterator = sheet.iterator();
                int rowIndex = 1;
                while (rowIterator.hasNext()) {
                    row = rowIterator.next();
                    if(rowIndex == 1){
                        rowIndex++;
                        continue;
                    }
                    Cell cell = row.createCell(0);
                    cell.setCellValue("error message");
                    rowIndex++;
                }
        }
        return workBook;
    }

Answer 2

如果您使用的是最新的C＃NPOI，则可以使用此实用程序功能：

/// <summary>Set view position at given coordinates.</summary>
/// <param name="sheet">A reference to the Excel sheet.</param>
/// <param name="topLeftCell">The coordinates of the cell that will show in top left corner when you open the Excel sheet (example: "A1").</param>
/// <param name="onlyFirstView">If true, only first sheet view will have position adjusted. If false, every views from the sheet will have have position adjusted.</param>
public static void SetViewPosition(ref NPOI.SS.UserModel.ISheet sheet, string topLeftCell = "A1", bool onlyFirstView = true)
{
    NPOI.OpenXmlFormats.Spreadsheet.CT_Worksheet worksheet = (NPOI.OpenXmlFormats.Spreadsheet.CT_Worksheet)(typeof(NPOI.XSSF.UserModel.XSSFSheet).GetField("worksheet", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance)?.GetValue((NPOI.XSSF.UserModel.XSSFSheet)sheet));
    if (worksheet?.sheetViews?.sheetView != null && worksheet.sheetViews.sheetView.Count > 0)
    {
        if (onlyFirstView)
            worksheet.sheetViews.sheetView[0].topLeftCell = topLeftCell;
        else
            foreach (NPOI.OpenXmlFormats.Spreadsheet.CT_SheetView view in worksheet.sheetViews.sheetView)
                view.topLeftCell = topLeftCell;
    }
}

用法示例：

NPOI.SS.UserModel.ISheet mySheet = myWorkbook.GetSheetAt(0);
// First sheet from our workbook opens with view set to top left corner (cell A1 visible in top left corner).
SetViewPosition(ref mySheet, "A1");

有没有办法使用POI将工作表的水平滚动条向左移动一列？

2 个答案: